Actually, it's a circular mill, first described in army ants by Schneirla (1944). A circle of army ants, each one following the ant in front, becomes locked into a circular mill. They will continue to...
Cheap, crappy violin: $80.
Extra e string so concert master could pretend to play it in class: $3.
Looks of students' faces when director smashed violin against the wall as part of a great april foo...